Madison police are working to combat what are being called "point 'em out, knock 'em out" attacks, in which the crimes are apparently committed for entertainment.
Police said they are hoping a surge of enforcement will prompt the attackers to stop.
On June 10, three teens were arrested after a 24-year-old man was punched and robbed at 3 p.m. on West Badger Road, Madison police said.
One of the suspects told police they were playing "point 'em out, knock 'em out," according to officials.
Police said it appears the same thing happened Friday night when a 17-year-old Madison resident was knocked unconscious when he was punched in the face in the 300 block of Northlawn Avenue.
Police said the victim was just hanging out with a 17-year-old girl when 19-year-old Demetrius Harding approached.